While iron supplements are generally safe, they can cause several side effects, particularly when taken on an empty stomach. Clinical studies report these common side effects:
- Gastrointestinal issues: Constipation, nausea, stomach pain
- Stool changes: Dark or black stools
- Tooth staining: Temporary discoloration
To minimize side effects, try taking supplements with food (except dairy products), starting with a lower dose, or using a slow-release formula. If side effects persist, consult your healthcare provider about switching to a different form of iron or adjusting the dosage.
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Last Updated: August 14, 2025
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